Firefox Community Forum

Secure Connection Failed

An error occurred during a connection to insights.lfx.dev. Cannot communicate securely with peer: no common encryption algorithm(s).

Error code: SSL_ERROR_NO_CYPHER_OVERLAP

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

At your recommendation I signed up to Ad Avoid and now FireFox tells me that I could/should not access BT.Com because of the certificate issued by Ad Avoid

I am subscribint to TheHybridLayer.com and the video requires access to player.vimeo.com. Unfortunately, the pop up message is saying that "Did Not Connect: Potential Security Issue." Please help me address the issue since I overwhelmed with this.

Current situation : I am using Macbook Air 11" 2015, MacOS Catalina, Firefox 145

i'm not connecting to my web site www.kroger.com something has me blocked . i tried everything to get in the message says secured connection failed . i called kroger stores and they said it is an internet problem .

Secure Connection Failed An error occurred during a connection to mail.yahoo.com. The OCSP response is not yet valid (contains a date in the future).

Error code: SEC_ERROR_OCSP_FUTURE_RESPONSE

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem. Learn more…

Try Again

Firefox blocked your visit to this site because the certificate provided for agents.shohoz.com has been revoked and isn’t trusted anymore.

Error code: SEC_ERROR_REVOKED_CERTIFICATE

View Certificate

Today when I try to access my Yahoo mail from www.yahoo.com, encountered Potential Security risk. Is this a problem encountered by others as well ? I still looking on how to report the issue to FireFox.

https://www.aiou.edu.pk/

This website not open

issue

Warning: Potential Security Risk Ahead

On some of my accounts that I use every day I keep getting unsecured site and can't advance to my site. Michales is one of them so I can't use my coupons to buy my products.

Running Surfshark on Windows 10 or 11 and Unbuntu 24.04. Some sites and attachments giving error failures. Happening with Firefox and Edge. Need troubleshoot source.

"Secure Connection Failed

An error occurred during a connection to forkliftgrocery.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem."'

Attachment error.

please provide directions for fixing the navigating inside NEwsmax site

Secure Connection Failed

The connection to www.newsmax.com was interrupted while the page was loading.

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Reviewing posts pertaining to SECURE CONNECTION FAILED and error code related to that message, one of the suggestions found on-line is to delete any listing from the Certificate Manager that is/may be a problem. However, NONE of those suggestions or discussions makes any mention about "how does one determine which listings those are?"

Relative novice here; was considering whether the "solution" was to merely delete all of the certificate listings, with the hope that the system would then repopulate what was necessary as time went on; some on-line information seems to indicate that to be not a good course of action . . . so my course of action has been to do nothing.

Question remains: how does one determine which listings can be deleted?

Thanks for any clarification.

Hi, I can't connect to my NAS anymore, via private IP. Impossible to add an exception for my auto-signed certificate. Immediate solution : stop using Mozilla. Another one ?

Thanks

I used to be able to connect with Firefox (with a warning message from you) to my local Netgear NAS, but now it just says:

Secure Connection Failed An error occurred during a connection to 192.168.1.100. Peer using unsupported version of security protocol. Error code: SSL_ERROR_UNSUPPORTED_VERSION The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the web site owners to inform them of this problem. This web site might not support the TLS 1.2 protocol, which is the minimum version supported by Firefox.

How can I still override this with Firefox. It's really important I can connect to my NAS.

With thanks,

Nick Curley